For centuries, people have enjoyed a shared pool of story, riffing with the same old themes, playing with each others’ work. After that and after my Walkman childhood came the Internet, and fun new worlds of mash-ups and sharing, open source and Creative Commons.
I love it all. Creativity should come from a spirit of communication, maybe cooperation, not the egotistic holding to oneself that copyright suggests. I like musicians to sample each other, and authors to reference each other, and film-makers to pastiche each other. I’m all for intertextuality and a sense of fun and play. I’m pretty much a copyleft sort of guy.
But. There are a couple of practical matters at hand.